Which statement is true regarding the handling of prescription drug samples?

The statement that samples must be given away for free to low-income patients is accurate and reflects a broader understanding of the regulations surrounding prescription drug samples. In the context of sample distribution, pharmaceutical companies often provide samples with the intent of facilitating access to medications for patients who may not be able to afford them. This aligns with various patient assistance programs designed to increase medication access.

Regulations typically place an emphasis on ensuring that samples are distributed to patients in a way that promotes public health and serves patients' best interests, especially those who are underserved or economically disadvantaged. Giving samples away for free, particularly to low-income patients, helps to fulfill this goal.

The other potential choices do not align with established regulations or common practices regarding prescription drug samples. For instance, selling samples to pharmacies contradicts the ethical guidelines intended for their provision, while distribution strictly to hospitals or prescribing samples alongside other medications do not accurately reflect how samples are intended to be managed or utilized within the healthcare system. Thus, the emphasis on providing samples free of charge to those in need supports the overall mission of improving access to medications while adhering to legal and ethical standards in pharmaceutical practices.